package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomerException;

import com.itheima.reggie.mapper.OrderMapper;
import com.itheima.reggie.pojo.*;
import com.itheima.reggie.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;


import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicLong;

@Service
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {

    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private OrderDetailService orderDetailService;

    /**
     * 用户下单
     * @param orders
     */
    @Override
    @Transactional
    public void submit(Orders orders) {
        //获取当前用户id
        Long userId = BaseContext.getCurrentId();
        //查询当前用户的购物车数据
        QueryWrapper<ShoppingCart> queryWrapper=new QueryWrapper<>();
        queryWrapper.eq("user_id",userId);
        List<ShoppingCart> shoppingCartList = shoppingCartService.list(queryWrapper);
        //判断购物车是否为空
        if (shoppingCartList==null || shoppingCartList.size()==0){
            throw new CustomerException("请购买商品后再进行结算");
        }

        long orderId = IdWorker.getId();//生成订单号
        BigDecimal amount=new BigDecimal(0);//总金额
        User user = userService.getById(userId);//查询用户数据
        AddressBook addressBook = addressBookService.getById(orders.getAddressBookId());//查询地址数据

        //组装订单明细信息
        List<OrderDetail> orderDetailList=new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            //将每一个 cart转换成 OrderDetail
            OrderDetail orderDetail=new OrderDetail();
            orderDetail.setName(cart.getName());
            orderDetail.setImage(cart.getImage());
            orderDetail.setOrderId(orderId);
            orderDetail.setDishId(cart.getDishId());
            orderDetail.setSetmealId(cart.getSetmealId());
            orderDetail.setDishFlavor(cart.getDishFlavor());
            orderDetail.setNumber(cart.getNumber());
            orderDetail.setAmount(cart.getAmount());
            amount=amount.add(cart.getAmount().multiply(new BigDecimal(cart.getNumber())));
            //将orderDetail添加到集合中
            orderDetailList.add(orderDetail);
        }

        //组装订单数据
        orders.setId(orderId);
        orders.setNumber(String.valueOf(orderId));
        orders.setStatus(2);
        orders.setUserId(userId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setAmount(amount);
        orders.setPhone(addressBook.getPhone());
        orders.setAddress(addressBook.getDetail());

        //向订单表插入数据，一条数据
        this.save(orders);
        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetailList);

        //清空购物车数据
        shoppingCartService.remove(queryWrapper);
    }
}
